Two plane mirrors are at right angles to each other. A man stands between them and combs his hair with the right hand. In how many images will he be seen using his left hand?
Total number of images formed by two mirrors at right angles is 
. But only one image will have the man with comb in his right hand. This image is produced by the imaginary mirror created between dual reflection. Thus, two images will have the man combing with left hand.
16